One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,3,4)(5,6,10,15)(7,16,8,12)(9,13,19,14)(11,18,20,17)(23,30)(27,35)(31,36)(32,34)(5,7,10,8)(6,11,15,20)(9,18,19,17)(12,13,16,14)(21,22)(23,31)(24,28)(25,29)(26,33)(27,32)(30,36)(34,35)(2,4)(5,8,10,7)(6,12,15,16)(9,18,19,17)(11,13,20,14)(21,23)(22,27)(24,32)(25,30)(26,34)(28,36)(29,35)(31,33)(6,13)(9,19)(11,16)(12,20)(14,15)(17,18)(21,24,25,26)(22,28,29,33)(23,32,30,34)(27,36,35,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.